To do this, use the Shrink One Page command. Word will attempt to shrink the document by one page by reducing the size and spacing of the text. For example, it will shrink the document above to 1 page, or it might shrink a 3-page document down to 2.

Tip: Save a copy of your document before using this command. In order to shrink the document, Word decreases the font size of each font used in the document. You can undo the command by pressing Ctrl + Z. However, after you save the document and close it, there is no quick way to restore the original font size.

Shrink One Page isn’t a commonly used command, so the button isn’t shown by default. You can, however, quickly add it. The quickest way to add the button is to add it to the Quick Access Toolbar.

In the Quick Access toolbar at the top of the Word window, click Customize Quick Access Toolbar (the small down arrow) and choose More Commands.

Under Choose commands from, click All Commands.

Scroll down through the list of commands until you find Shrink One Page.